Convertible privacy-passage lock set

ABSTRACT

A door lock set having a shaft fitted at one end with an outside handle knob and at the opposite end with an inside handle knob non-rotatably secured to the shaft by a rotor. The knobs are rotatably mounted on end plates which support a housing extending through a door opening to enclose the shaft. A slide block is mounted in the housing and is connected at one end to a latch bolt. Drive means interconnect the rotor and slide block. Locking means is provided to secure the rotor against rotation within the housing whereby the slide block cannot be actuated to retract the latch bolt. Kickoff means operates to release the locking means if the door is swung shut with the set locked. Converting means allows adjustment of the inside handle knob whereby the locking means can be rendered inoperative so that the set will function as a latch set.

United States Patent [191 McBurnie et al.

[451 Jan. 7, 1975 I 1 CONVERTIBLE PRIVACY-PASSAGE LOCK SET [73] Assignee: Velto Industries Ltd., Vancouver,

British Columbia, Canada [22] Filed: June 25, 1973 [21] Appl. No.: 373,596

[52] U.S. Cl. 292/169.l5, 292/DIG. 38 [51] Int. Cl. E056 l/16 [58] Field of Search 70/152; 292/169.14, 169.15, 292/169.16, 169.18, 169.21, 169.22, 169.23,

336.5, 337, 353, 359, DIG. 38, DIG. 52

[56] References Cited UNITED STATES PATENTS 2,263,477 11/1941 Voight.... 292/169.l8 X 2,299,180 10/1942 Schlage 292/169.18 2,497,329 2/1950 Smith et al 292/l69.14

3,055,691 9/1962 Kessel 292/337 3,580,622 5/1971 Morgan 292/353 X 3,792,886 2/1974 Ramsey 292/169.21

Primary Examiner-Albert G. Craig, Jr. Attorney, Agent, or Firm-Fetherstonhaugh & C0.

[57] ABSTRACT A door lock set having a shaft fitted at one end with an outside handle knob and at the opposite end with an inside handle knob non-rotatably secured to the shaft by a rotor. The knobs are rotatably mounted on end plates which support a housing extending through a door opening to enclose the shaft. A slide block is mounted in the housing and is connected at one end to a latch bolt. Drive means interconnect the rotor and slide block. Locking means is provided to secure the rotor against rotation within the housing whereby the slide block cannot be actuated to retract the latch bolt. Kickoff means operates to release the locking means if the door is swung shut with the set locked. Converting means allows adjustment of the inside handle knob whereby the locking means can be rendered inoperative so that the set will function as a latch set.

16 Claims, 12 Drawing Figures PATENTH] JAN 7 75 SHEET 10F 3 m: QM

1 CONVERTIBLE PRIVACY-PASSAGE LOCK SET This invention relates to a door lock set and particularly to a set which can be converted from a privacy set to a passage set or vice versa.

Most lock sets in use today are quite complex and have many operating parts which can be costly and time consuming to manufacture and assemble. Whenever attempts are made to construct a lock or privacy set which is convertible to a latch or passage set, this adds to the complexity and cost. Furthermore, the eventual purchaser of the set finds himself with an item which is best installed by a skilled tradesman whose services are often required if the set is to be converted at some later date from one type of set to another.

The present set overcomes many of the disadvantages of previously known sets by providing a mechanism having relatively few parts nearly all of which are made of inexpensive plastic. These parts are designed so that they do not require fasteners of any kind to secure them to one another or to the door and, in addition, so that they can be assembled as either a privacy set or a passage set which can be converted later if nec-' essary thus providing two types of sets for less than the price of a conventional set. The relatively few parts which make up the set reinforce one another in such a way that it is almost impossible to damage the mechanism by applying excessive force to the handle knob as might be done by an intruder attempting to gain entry to a room. If the door is slammed with the set locked, a kickoff feature releases the lock to prevent the door from being locked accidentally.

In drawings which illustrate a preferred embodiment of the invention,

FIG. 1 is a horizontal section of a lock set, constructed in accordance with the present invention,

FIG. 2 is a side elevation of a housing of the set,

FIG. 3 is an elevation of the housing as viewed from the inside end thereof with parts broken away to show the connection between a slide block and latch bolt of the set,

FIG. 4 is a vertical section taken on the line 4-4 of FIG. 1,

FIG. 5 is a longitudinal section taken on the line 5-5 of FIG. 4,

FIG. 6 is an elevation of a flanged end of a rotor for the set,

FIG. 7 is a perspective view of the slide block,

FIG. 8 is a perspective view of a latch bolt assembly for the set,

FIGS. 9 and 10 are horizontal sections showing locking means for the rotor and slide block in engaged and disengaged positions respectively, and

FIGS. 11 and 12 are fragmentary plan views, part in section, showing converting means for changing the lock set to a passage set. V

Referring to the drawings, the numeral 10 indicates generally a lock set which, with the exception of two parts, preferably is constructed of a suitable, hardwearing plastic. The set 10 is shown mounted in a door 12, see FIG. 1 only, which is assumed to be an interior door, the door being hung in the usual door frame 14 having a jamb 15. To receive this set, the door is provided with a large horizontal opening 17 extending between inside and outside faces 18 and 19 of the door and spaced a suitable distance from the unhinged side edge 20 of the door. A relatively small horizontal opening 21 is drilled into theside edge 20 to connect with the large opening 17, the axes of the two openings being perpendicular to one another.

The several parts making up the set 10 include a cy lindrical housing 30 which projects through the door opening 17. This tubular housing 30 has an inside end edge 32 spaced from the face 18 of the door and, ex tending around the complete circumference of this edge, is a tapered locking member 33. The opposite or outside end edge 34 of the housing has an external thread 35. This thread is interrupted by a longitudinally extending and substantially rectangular opening 36, see particularly FIGS 2, which opening is formed on the left side of the housing 30 as viewed in FIG. '1. Opening 36 extends in from end edge 34 and terminates a short distance from the rib 33 whereby to partly register with the door opening 21.

The housing 30 is supported between end plates 40 and 41 which bear against the faces 18 and 19 respectively of the door. Inside plate 40 has an annular flange 45 on which a tapered locking member 46 is formed. Plate 41 has an annular flange 47 provided with an internal thread 48. Thus, the oppositely tapered members 33 and 46 are snapped together or overlapped to connect the inside end plate 40 to the housing 30 and the outside end plate 41 is threaded to the opposite end edge 34 of the housing. When the threads 35 and 48 are tightened, the two end plates 40'and 41 are clamped against the opposite faces of the door and the housing 30 is firmly supported therebetween. The housing 30 closely fits the opening 17 and is provided with circumferentially spaced lugs 50 (FIGS. '2 and 3) adapted to bite into the end grain of the wood at the top-and bottom of the opening 17 thereby to further resist rotation of the assembly in the door. This arrangement prevents the set 10 from'becoming loose in the door.

The end plate 40 has a concentric sleeve portion 54 and slidably and rotatably mounted on this sleeve portion is a handle knob 55. A flexible cover 56 is snapped into rim 57 of the hollow handle knob 55 to finish off the knob. Integrally formed on the cover 56 is a centrally disposed and inwardly projecting wedge 58.

Rotatably mounted on a concentric sleeve portion 59 of the end plate 41, is a similar knob 60 having a rim 61 fitted with a flexible,snap-in cover 62 provided with a central aperture 63. The outside handle knob 60 is provided with a tubular hub 64 having a through bore 65 which is square in cross-section. the innermost end of the generally cylindrical hub 64 has a flange 66, the hub end and flange being split or divided circumferentially into four longitudinally extending parts as shown at 67 in FIG. 1 whereby these slightly resilient quarters of the flanged end of the hub can be sprung together. Flange 66 is bevelled as at 68 and is provided with a shoulder which forms a locking member 69 adapted to overlap and engage a corner or locking member 70 formed on an inner annular flange 71 of the end plate 41. Thus, the handle knob 60 can be pushed into the sleeve portion 59 whereupon the members 69 and 76 snap into engagement to resist withdrawal of the rotatably mounted knob from the end plate.

The bore 65 of the hub is made square in crosssection to non-rotatably receive one end of a crosssectionally square shaft 74 which is made of steel. Shaft 74 snugly fits the bore 65 so that the divided flanged end of the hub 64 cannot be compressed as is required to release the overlapping members 69 and 70 thereby locking the knob to the end plate 41. Shaft 74 is free to move endwise in the bore but, of course, cannot rotate therein.

Secured to the opposite end of the shaft 74 is a rotor 76 which has a bore 77 square in cross-sectionto receive the shaft end. A pair of horizontally spaced prongs 78 are formed on the end of the rotor which is enclosed by the knob 55 and'these prongs are slightly resilient as well so that they can be sprung together. Each prong 78 has an outwardly projecting rib 79 the ,ends'of which are provided with a bevel 80 and a shoulder or locking member 81. This arrangement allows the prongs 78 to be pushed into a tubular hub 84 formed on the handle knob 55 whereby the members 81 will snap into overlapping engagement with an end edge member 85 on the hub. When the cover 56 is fitted to the knob 55, the wedge 58 enters between the prongs I 78 and prevents separation of the knob and rotor.

The shaft 74 can be rotated in either direction by means of the handle. knobs 55 and 60. The interconnected knob 55 and rotor 76 can be moved in and out a short distance relative to the end plate 40 and the shaft 74, of course, moves with the rotor. In other words, the knob 55 with the rotor 76 attached thereto can be moved between the in position shown by solid lines in FIG. 1 to an out position represented by the dotted lines in the same view.

Referring now particularly to FIGS. 4, 5 and 6, the rotor 76 will be seen to have an intermediate portion 1 86 which is in the form of a cross when viewed in transverse section. The inner periphery of the tubular hub which is substantially oval-shaped as viewed in elevation (FIG. 6).

The flange 87 of the rotor opposes a block 90, see particularly FIG. 7, whichis slidably mounted in the housing 30. To support the slide block 90 in this manner, the interior of the housing is provided with horizontal guide members 94 (FIG. 3) which are vertically spaced apart to fit into grooves 95 (FIG. 7) formed in opposite side edges of the block. Thus, the block 90 is mounted for horizontal sliding movement in the housing along a fixed path of travel having an axis disposed perpendicular to the longitudinal axis of the shaft 74. A slot 97 extends through the center of the block 90 and the shaft 74 projects freely through this slot as the block slides back and forth. I The small opening 21 in the door is fitted with a latch bolt assembly generally indicated at 100. As shown in FIGS. 1, 3 and 8, the assembly 100 comprises a generally cylindrical sleeve 101, a latch bolt 102, and a metal compression spring 103 (FIGS. 1 and 3 only). The outer surface of the sleeve 101 is provided on the top and bottom thereof with longitudinally extending ribs 104 (FIG. 8) which are spaced inwardly from an outer end flange 105 to provide an annular groove 106. The sleeve surface tapers inwardly from the ribs 104 as at 107. Latch bolt 102 is slidably mounted in the sleeve 101 but is non-rotatably mounted therein by a key and keyway arrangement 108, see particularly FIG. 1. Bolt 102 is provided with a head 109 which normally is urged outwardly to project beyond the flange 105 by the spring 103. A shoulder 110 (FIG. 3) is provided on the bolt to engage a stop 111 on the sleeve whereby to limit outward movement of the latch bolt.

When the sleeve 101 is driven into the opening 21, the ribs 104 bite into the end'grain of the wood and hold the assembly 100 against rotation. The end grain near the edge 20 of the door enters the groove 106 and firmly holds the sleeve in place. A well made door has the edge 20 thereof tapered as shown in FIG. 1 and the flanged outer'edge of the sleeve is correspondingly tapered to lie flush with the door edge.

The sleeve 101 is secured to the housing 30 by connecting means comprisinig a pair of transverse ribs 114 which are formed on the inner end of the sleeve. These vertical ribs 114 are received in a pair of longitudinal channels 115, see FIGS.2 and 3, which are formed in the housing 30 one above and one below the side edges of the opening36. The housing must be entered into the opening 17 from the inside surface of the door in order to enter the vertically standing ribs 114 in the horizontal channels 115 whereupon the assembly 100 also serves to hold the housing against rotation about the longitudinal axis of the door opening.

Referring again to FIGS. 3 and 7, slide block 90 and latch bolt 102 are interconnected by coupling means comprising a T-shaped slot the axis of which extends parallel to the longitudinal axis of the shaft 74. This slot 120 receives the T-shaped inner end 121 of the latch bolt whereby these two interconnected parts cannot be separated except by parallel movement relative to one another whichis not possible after assembly of thelock set.

The jamb 15, see FIG. 1, is fitted with the usual strike plate 124 which has a rectangular opening 125 registering with a recess 126 out into the face of the jamb. Head 109 of the latch bolt has a cam face 128 adapted to engage a similar cam face 129 formed on a overhanging inside edge of the strike plate. When the door the shaft 74. Rotation of the shaft rocks the rotor 76 whichis operatively connected to the slide block 90 by drive means and this moves theslide block away from the door edge 20 whereby to retract the latch bolt 102. It will be noticed particularly in FIG. 3 that, when the latch bolt 102 is fully retracted, slide block 90 bears against the inner periphery of the housing 30 on the crescent-shaped abutment 137 which is formed on the face of the slide block 90 which opposes the rotor 76. This abutment 137 is provided, on opposite sides of the slot 97, with a number of parallel thread-like ribs 138 which have sloping side edges 139. The ribs 138 mesh with similar ribs 140 having side edges, 141, these lastmentioned ribs being formed on a substantially triangular part 142 of a segmental abutment 143 provided on the face of the rotor 76 which opposes the slide block 90. When the rotor and slide block are in face-to-face contact as shown in FIGS. 1 and 9, the vertical ribs 138 and 140 are fully engaged, the two abutments 137 and 143 being held together by the spring 103. The rotor 76, of course, rocks with the shaft 74 so that when one of the handle knobs is turned in either direction, the slide block 90 is forced to the right (FIG. 1) whereby to retract the latch bolt 102 from the door jamb and this unlatches the door.

The set is provided with locking means generally indicated at 150 and which is shown best in FIGS. 6, 7, 9 and 10. In FIG. 6, the face of the rotor 76 opposite the slide block will be seen to have a substantially oblong boss 151 which slidably fits into the slide block slot 97. Another oblong boss 152 is also formed on the opposing face of the rotor 76 and this boss normally is slidably received in a slot 153 (see particularly FIG. 7) formed in the abutment 137 on the slide block. Thus, when the bosses 151 and 152 are lodged in their slots 97 and 153, the rotor 76 is keyed to the slide 90 and is held against rotation.

The remainder of the locking means 150 comprises a pair of lugs 156, see particularly FIG. 6, which are formed on the inner periphery of the housing 30 to project inwardly thereof. These lugs 156 are adapted to enter recesses 158 formed on the flange 87 of the rotor 76 whereby to prevent rotation of the rotor with respect to the housing. It will be recalled that the rotor 76 moves with the inside handle knob 55 between the in and out positions. The lugs 156 are lodged in the recesses 158, and the bosses 151 and 152 are entered into the slots 97 and 153, when the knob 55 is pushed to the in position and therefore the slide block 90 is locked to the rotor 76 and the rotor in turn is locked to the housing 30. Since the shaft 74 cannot be turned by either handle knob, the latch bolt 100 cannot be retracted and the set 10 locks the door. This locked position is shown in FIGS. 1 and 9, the unlocked position being shown in FIG. 10.

Sometimes a door 12 will be accidentally swung shut with the knob 55 pushed in and the locking means 150 engaged and normally this would cause the door to lock accidentally whereby to bar someone from entering the room. To prevent this accidental locking under these circumstances, the present set is provided with kickoff means 164 which is incorporated into the locking means 150. The kickoff means 164 comprises a cam face 165 on the rotor boss 151. The slot 97 formed in the slide block has a bevelled edge 166 which is located near the cam face 165 as shown in FIG. 9 when the locking means is engaged. If the door is slammed with the set locked, the cam face 128 on the latch bolt and the cam face 129 on the striker plate co-operate to force the latch bolt 102 inwardly. Inward movement of the latch bolt and slide block causes the bevelled edge 166 of the slot 97 to ride along the cam face 165 whereby to force the rotor 76 and the knob 55 to the out position and this movement disengages the locking means 150. Thus, the locking means 150 is disengaged and the door is merely latched when accidentally slammed and can be unlatched by turning either handle knob.

The lock set 10 can be changed over from the above described privacy set (lockable) to a passage set which latches but does not lock the door by use of converting means 170, see FIGS. 11 and 12. As shown, the means 170 comprises a pair of diametrically opposed notches 171 which are formed on inner end edge 172 of the inside handle knob 55. When the set 10 is installed so that it can be used to lock the door, the notches 171 are disposed in a vertical plane at which time the inner end edge 172 bears against a pair of shoulders 174 formed on the cross-shaped intermediate portion 86 of the rotor, these shoulders being in a horizontal plane. The knob 55 has an annular groove 176 and end edge 177 of the sleeve portion 54 bottoms in this groove when said knob is pushed to the in position to engage the locking means 150. When knob 55 is pulled to the out position, another pair of diametrically-opposed shoulders 178 on the rotor 76 engage inner end edge 179 of the sleeve portion 54 to limit outward travel of the knob and the rotor whereupon end edge177 is almost completely withdrawn from the groove 176. In other words, the knob 55 and rotor 76 can be moved in and out relative to the end plate portion 54 a distance sufficient to engage and disengage the locking means 150 whenever the notches 171 are vertically disposed as previously described. The drive means 135, of course, always remains engaged regardless of whether the knob 55 is in the in or out positions.

To convert the set 10 to a passage set which will latch but not lock the door, the cover 56 is removed from the inside handle knob and this withdraws the wedge 58 from between the prongs 78. These prongs can then be squeezed together to allow the knob 55 to be removed and turned before being replaced. The notches 171 are now in a horizontal plane and the shoulders 174 enter the notches while the end edges 177 again bottoms in the groove 176. When the cover 56is replaced to lock the prongs 78 once again within the tubular hub 84, the conversion to a passage set is complete.

FIG. 12 shows the converting means 170 adjusted to change the set from a privacy to a passage set. It will be seen that the knob 55 cannot be pushed inwardl y beyond this position because of the fact that the end edge, 177 of the sleeve portion is fully entered into the groove 176. Thus, the locking means 150 cannot be engaged although the drive means remains operative so that the latch bolt 102 can be retracted by rotation of either handle knob in either direction.

From the foregoing, it will be apparent there is provided a lock or privacy set which can readily be converted to a latch or passage'set. The relatively few parts which makeup the set are extremely rugged and are designed to support one another in such a way that it is almost impossible for the hard wearing mechanism to be damaged through improper use. i

The set 10 has been described as used on an interior door such as a bathroom door but a similarly constructed set can be used on an exterior door which was not intended to be opened by a key. In this case, the cam face 165 is eliminated from the rotor boss 166 so that, when the locking means is engaged, it cannot be disengaged by someone using a plastic card or the like to force retraction of the latch bolt. Thus, the locking means serves as a deadbolt which will prevent forced entry. The aperture 63 in the cover used on the outside handle knob is intended to admit a needle-like tool which could be used to unlock the set if a bathroom door was accidently locked by a child, for exam- 1. A door lock set comprising a tubular housing extendable through a door opening, an end plate secured an adjacent and plate, an inside handle knob rotatably mounted on an adjacent end plate for sliding movement longitudinally of the shaft between in and out positions, a rotor non-rotatably securing the inside handle knob to the opposite end of the shaft and being movable longitudinally with said knob to the in and out positions, a slide block mounted within the tubular housing for sliding movement on an axis normal to the longitudinal axis of the shaft, a latch bolt connected to the slide block and slidably projecting through an opening in the tubular housing for movement relative to an edge of the door between extended and retracted positions, spring means biasing the latch bolt to the extended position, drive means connecting the rotor to the slide block whereby rotation of the shaft in either direction moves the latch bolt towards the retracted position, and locking means engaged only when the inside handle knob is in the in position for interlocking the rotor with the housing and the slide block.

2. A door lock set as claimed in claim 1, and including kickoff means for disengaging the locking means, said kickoff means operating when the latch bolt is forced to the retracted position by pressure applied to the outer end of said latch bolt.

3. A door lock set as claimed in claim 2, in which said locking means comprises an inwardly projecting lug on the inner periphery of the housing, a recess on the rotor to receive the lug and lock the rotor against rotation.

within the housing, a boss on the face of the rotor opposing the slide block, said slide-block having a longitudinal slot in which the boss is slidably received.

4. A door lock set as claimed in claim 3, in which said kickoff means comprises a cam face on the rotor boss, said longitudinal slot of the slide block having an end edgeengaging the cam face when the inside handle knob is in the in position.

5. A door lock set as claimed in claim 1, and including converting means for repositioning the inside handle knob on the rotor whereby the locking means is rendered inoperative and the set functions as a passage set.-

6. A door lock set as claimed in claim 5, in which said converting means comprises intermeshing members on the inside handle knob and the rotor, said members when intermeshed positioning the inside handle knob on the rotor whereby the locking means can be engaged and when disaligned by substantially 90 rendering the locking means inoperative.

7. A door lock set as claimed in claim I, in which said drive means slidably connects the rotor to the slide block whereby to remain engaged in both the in and out positions of the inside handle knob.

8. A door lock set comprising a tubular housing extendable through a door opening, an end plate secured to each opposite end of the tubular housing to nonrotatably engage opposite faces of the door, a shaft projecting through the tubular housing into aligned openings in the end plates, an outside handle knob nonrotatably and slidably secured to one end of the shaft and being rotatably mounted on an adjacent end plate,

an inside handle knob rotatably mounted on an adjacent end plate for sliding movement longitudinally of the shaft between in and out positions, a rotor nonrotatably securing the inside handle knob to the opposite end of the shaft and being movable longitudinally with said knob to the in and out positions, a slide block mounted within the tubular housing for sliding movement on an axis normal to the longitudinal axis of the shaft, a latch bolt connected to the slide block and slidably projecting through an opening in the tubular housing for movement relative toan edge of the door between extended and retracted positions, spring means biasing the latch bolt to the extended position, drive means connecting the rotor to the slide block whereby rotation of the shaft in either direction moves the latch bolt towards the retracted position, said drive means allowing axial sliding movement of the rotor relative to the slide block, locking means engaged only when the inside handle knob is in the in position for interlocking the rotor with the housing and the slide block, kickoff .means for disengaging the locking means, said kickoff means operating when the latch bolt is forced to the retracted position by pressureapplied to the outer end of said latch bolt, and converting means for repositioning the inside handle knob on the rotor whereby the locking means is rendered inoperative .and the set functions asa passage set.

9. A door lock set as claimed in claim 8, in which said latch bolt is mounted in a sleeve secureable in a door edge opening, and connecting means securing an inner end of the sleeve to the housing and engaged in response to longitudinal movement of said housing in one direction.

10. A door lock set as claimed in claim 9, in which said connecting means comprises a pair of vertically spaced and transversely extending ribs on the inner end of the sleeve, said housing having longitudinal channels formed therein to slidably receive, the sleeve ribs whereby the housing is supported against rotation by the sleeve;

11. A door lock set as claimed in claim l0, in which said slide block has a T-shaped slot on one end thereof, said latch bolt having a T-shaped inner end enterable into the T-shaped slot only by movement of the slide block parallel to said latch bolt.

12. A door lock set as claimed in claim 11, in which said sleeve is provided with longitudinal ribs on the periphery thereof adapted to bite into end grain of the door opening.

13. A door lock set as claimed in claim 8, in said housing has a tapered flange on one end and a thread on an opposite end thereof, one of said end plates having a tapered flange engageable with the tapered flange of the housing with a snap-on action, and the other of said end plates having a thread meshing with the housing thread whereby to clamp the assembly to the opposite faces of a door.

14. A door lock set as claimed in claim 8, in which said outside handle knob has a tubular hub projecting through an annular flange of the adjacent end plate, said tubular hub having an inner end divided into resilient parts, said inner end and annular flange having interengaging locking members resisting separation of the handle knob from the end plate, said shaft being slidably and non-rotatably secured within the tubular hub and supporting the inner end of said hub against locking members.

to prevent disengagement of the locking members.

16. A door lock set as claimed in claim 8, in which said outside handle knob has a tubular hub projecting through an annular flange of the adjacent end plate,

said tubular hub having an inner end divided into resilient parts, said inner end and annular flange having interengaging-locking members resisting separationof the handle knob from the end plate, said shaft being slidably and non-rotatably secured within the tubular hub and supporting the inner end of said hub against deformation which will allow disengagement of the locking members, said inside handle knob having a tubular hub, resilient prongson the rotor projecting through the tubular hub of the inside handle knob, locking members on the inside handle knob tubular hub and the prongs resisting-separation of said knob and the rotor, and a wedge carried by-the inside handle knob enterable between the prongs to prevent disen-- gagement of the adjacent locking members. 

1. A door lock set comprising a tubular housing extendable through a door opening, an end plate secured to each opposite end of the tubular housing to non-rotatably engage opposite faces of the door, a shaft projecting through the tubular housing into aligned openings in the end plates, an outside handle knob secured to one end of the shaft and being rotatably mounted on an adjacent and plate, an inside handle knob rotatably mounted on an adjacent end plate for sliding movement longitudinally of the shaft between in and out positions, a rotor non-rotatably securing the inside handle knob to the opposite end of the shaft and being movable longitudinally with said knob to the in and out positions, a slide block mounted within the tubular housing for sliding movement on an axis normal to the longitudinal axis of the shaft, a latch bolt connected to the slide block and slidably projecting through an opening in the tubular housing for movement relative to an edge of the door between extended and retracted positions, spring means biasing the latch bolt to the extended position, drive means connecting the rotor to the slide block whereby rotation of the shaft in either direction moves the latch bolt towards the retracted position, and locking means engaged only when the inside handle knob is in the in position for interlocking the rotor with the housing and the slide block.
 2. A door lock set as claimed in claim 1, and including kickoff means for disengaging the locking means, said kickoff means operating when the latch bolt is forced to the retraCted position by pressure applied to the outer end of said latch bolt.
 3. A door lock set as claimed in claim 2, in which said locking means comprises an inwardly projecting lug on the inner periphery of the housing, a recess on the rotor to receive the lug and lock the rotor against rotation within the housing, a boss on the face of the rotor opposing the slide block, said slide block having a longitudinal slot in which the boss is slidably received.
 4. A door lock set as claimed in claim 3, in which said kickoff means comprises a cam face on the rotor boss, said longitudinal slot of the slide block having an end edge engaging the cam face when the inside handle knob is in the in position.
 5. A door lock set as claimed in claim 1, and including converting means for repositioning the inside handle knob on the rotor whereby the locking means is rendered inoperative and the set functions as a passage set.
 6. A door lock set as claimed in claim 5, in which said converting means comprises intermeshing members on the inside handle knob and the rotor, said members when intermeshed positioning the inside handle knob on the rotor whereby the locking means can be engaged and when disaligned by substantially 90* rendering the locking means inoperative.
 7. A door lock set as claimed in claim 1, in which said drive means slidably connects the rotor to the slide block whereby to remain engaged in both the in and out positions of the inside handle knob.
 8. A door lock set comprising a tubular housing extendable through a door opening, an end plate secured to each opposite end of the tubular housing to non-rotatably engage opposite faces of the door, a shaft projecting through the tubular housing into aligned openings in the end plates, an outside handle knob non-rotatably and slidably secured to one end of the shaft and being rotatably mounted on an adjacent end plate, an inside handle knob rotatably mounted on an adjacent end plate for sliding movement longitudinally of the shaft between in and out positions, a rotor non-rotatably securing the inside handle knob to the opposite end of the shaft and being movable longitudinally with said knob to the in and out positions, a slide block mounted within the tubular housing for sliding movement on an axis normal to the longitudinal axis of the shaft, a latch bolt connected to the slide block and slidably projecting through an opening in the tubular housing for movement relative to an edge of the door between extended and retracted positions, spring means biasing the latch bolt to the extended position, drive means connecting the rotor to the slide block whereby rotation of the shaft in either direction moves the latch bolt towards the retracted position, said drive means allowing axial sliding movement of the rotor relative to the slide block, locking means engaged only when the inside handle knob is in the in position for interlocking the rotor with the housing and the slide block, kickoff means for disengaging the locking means, said kickoff means operating when the latch bolt is forced to the retracted position by pressure applied to the outer end of said latch bolt, and converting means for repositioning the inside handle knob on the rotor whereby the locking means is rendered inoperative and the set functions as a passage set.
 9. A door lock set as claimed in claim 8, in which said latch bolt is mounted in a sleeve secureable in a door edge opening, and connecting means securing an inner end of the sleeve to the housing and engaged in response to longitudinal movement of said housing in one direction.
 10. A door lock set as claimed in claim 9, in which said connecting means comprises a pair of vertically spaced and transversely extending ribs on the inner end of the sleeve, said housing having longitudinal channels formed therein to slidably receive the sleeve ribs whereby the housing is supported against rotation by the sleeve.
 11. A door lock set as claimed in claim 10, in which said slide block has a T-shaped slot on one end thereof, said latch bolt having a T-shaped inner end enterable into the T-shaped slot only by movement of the slide block parallel to said latch bolt.
 12. A door lock set as claimed in claim 11, in which said sleeve is provided with longitudinal ribs on the periphery thereof adapted to bite into end grain of the door opening.
 13. A door lock set as claimed in claim 8, in said housing has a tapered flange on one end and a thread on an opposite end thereof, one of said end plates having a tapered flange engageable with the tapered flange of the housing with a snap-on action, and the other of said end plates having a thread meshing with the housing thread whereby to clamp the assembly to the opposite faces of a door.
 14. A door lock set as claimed in claim 8, in which said outside handle knob has a tubular hub projecting through an annular flange of the adjacent end plate, said tubular hub having an inner end divided into resilient parts, said inner end and annular flange having interengaging locking members resisting separation of the handle knob from the end plate, said shaft being slidably and non-rotatably secured within the tubular hub and supporting the inner end of said hub against deformation which will allow disengagement of the locking members.
 15. A door lock set as claimed in claim 8, in which said inside handle knob has a tubular hub, said rotor having resilient prongs projecting through the tubular hub, locking members on the tubular hub and the prongs resisting separation of the inside handle knob and the rotor, and a cover fitted to the inside handle knob and having a wedge enterable between the prongs to prevent disengagement of the locking members.
 16. A door lock set as claimed in claim 8, in which said outside handle knob has a tubular hub projecting through an annular flange of the adjacent end plate, said tubular hub having an inner end divided into resilient parts, said inner end and annular flange having interengaging locking members resisting separation of the handle knob from the end plate, said shaft being slidably and non-rotatably secured within the tubular hub and supporting the inner end of said hub against deformation which will allow disengagement of the locking members, said inside handle knob having a tubular hub, resilient prongs on the rotor projecting through the tubular hub of the inside handle knob, locking members on the inside handle knob tubular hub and the prongs resisting separation of said knob and the rotor, and a wedge carried by the inside handle knob enterable between the prongs to prevent disengagement of the adjacent locking members. 